單項選擇題In setting the valves on a steam-smothering system on a tank vessel,the master control valve to cargo tanks should be().

A.open and individual tank valves open
B.open and the individual tank valves closed
C.closed and the individual tank valves closed
D.closed and the individual tank valves open


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1.單項選擇題If you are fighting a fire below the main deck of your vessel,which action is most importantconcerning the stability of the vessel? ()

A.Shutting off electricity to damaged cables
B.Pumping fire-fighting water overboard
C.Maneuvering the vessel so the fire is on the lee side
D.Removing burned debris from the cargo hold

3.單項選擇題Hoses used for cargo transfer operations must be tested and inspected at specified intervals by().

A.a representative of the Captain of the Port
B.the operator of the vessel or facility
C.a representative of the National Cargo Bureau
D.low inert gas temperature

4.單項選擇題Each inert gas system gas main must have an automatic shut down valve at the outlet of the gas production plant. This valve must close automatically upon().

A.cargo pump failure
B.blower failure
C.deck seal low water level
D.low inert gas temperature

5.單項選擇題During loading and discharging operations,in addition to when the cargo tanks have been properly filled,each inert gas system must be capable of maintaining a minimum gas pressure of().

A.150 millimeters of water pressure
B.125 millimeters of water pressure
C.100 millimeters of water pressure
D.75 millimeters of water pressure